Sökning: "Envisat"

Hittade 5 uppsatser innehållade ordet Envisat.

  1. 1. Satellite derived data to support flood modelling : An application to the Po River

    Master-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

    Författare :Victor Alejandro Ortiz Peña; Milos Dinic; [2018]
    Nyckelord :Hydraulic Modelling; Flood Modelling; HEC-RAS; Mannings Coefficient; DEM; LiDAR; SRTM; Virtual Stations;

    Sammanfattning : Satellite derived data has become an essential input in hydraulic modelling. Digital ElevationModels (DEMs) derived from different sources through remote sensing techniques have become a powerful tool for poorly gauged regions. LÄS MER

  3. 2. Measuring coastal erosion along the coast of Ystad municipality using PSInSAR and SBAS

    Master-uppsats, Stockholms universitet/Institutionen för naturgeografi

    Författare :Tom Halldén Halldén; [2017]
    Nyckelord :GIS; PSInSAR; SBAS; erosion; coastal; radar; interferometry; ENVISAT; ERS-2;

    Sammanfattning : In this study the use of two radar interferometry methods, PSInSAR and SBAS, were tested as tools for measuring coastal erosion. If successful it would have allowed for measuring coastal erosion as a function of material lost. The study area used was Ystad municipality, in southern Sweden. LÄS MER

  4. 3. Attitude and Orbit Control During Deorbit of Tethered Space Debris

    Master-uppsats, KTH/Farkost och flyg

    Författare :Linus Flodin; [2015]
    Nyckelord :space debris mitigation; deorbit; tethered satellites; mathematical modeling; attitude and orbit control system; LQG control; PID control; switched control;

    Sammanfattning : Due to the unsustainable space debris environment in Low Earth Orbit, debris objects must be removed to ensure future safe satellite operations. One proposed concept for deorbiting larger space debris objects, such as decommissioned satellites or spent upper rocket stages, is to use a chaser spacecraft connected to the debris object by an elastic tether, but the required technology is immature and there is a lack of flight experience. LÄS MER

  5. 4. Unsupervised Change Detection Using Multi-Temporal SAR Data : A Case Study of Arctic Sea Ice

    Master-uppsats, KTH/Geodesi och geoinformatik

    Författare :Linda Fröjse; [2014]
    Nyckelord :sea ice; the Arctic; Kittler-Illingworth; generalized Gaussian distribution; log-normal distribution; ERS; ENVISAT; SAR; ASAR; havsis; Arktis; Kittler-Illingworth; generaliserad normaldistribution; lognormal distribtion; ERS; ENVISAT; SAR; ASAR;

    Sammanfattning : The extent of Arctic sea ice has decreased over the years and the importance of sea ice monitoring is expected to increase. Remote sensing change detection compares images acquired over the same geographic area at different times in order to identify changes that might have occurred in the area of interest. LÄS MER

  7. 5. ENVISAT ASAR for Land Cover Mappingand Change Detection

    Master-uppsats, KTH/Geodesi och satellitpositionering

    Författare :Kazi Iashtiak Ahmed; [2006]
    Nyckelord :;

    Sammanfattning : The principal objective of this research is to investigate the capability of multi-temporal,multi-incidence angle, dual polarization ENVISAT ASAR imagery for extractinglanduse/land cover information in the rural-urban fringe of the Greater Toronto Area (GTA)using different image processing techniques and classification algorithms. An attempt todetermine the temporal change of landuse is also made. LÄS MER